Animated Navigation with CSS & jquery

Transcription

1 1 of 5 7/31/2009 1:44 PM Blog» CSS/XHTML» Animated Navigation with CSS & jquery Animated Navigation with CSS & jquery July 28th, 2009 As I was checking out some flash sites for inspiration, I ran across a couple websites that had some nice navigation effects. I m not a huge fan of wildly animated navs, but these had simple and elegant roll over effects that I liked. I decided to imitate the effect with CSS and jquery, and would like to share this technique today. View Demo Step 1. Wireframe HTML This part is very simple. Your typical unordered list with links. <ul id="topnav"> <li><a href="#">home</a></li> <li><a href="#">services</a></li> <li><a href="#">portfolio</a></li> <li><a href="#">blog</a></li> <li><a href="#">about</a></li> <li><a href="#">contact</a></li> </ul> Step 2. Styling CSS Only thing special about the below properties will be that each list item has an overflow of hidden to imitate the masking technique. Check out the image below to see what I mean.

2 2 of 5 7/31/2009 1:44 PM Notice there were no duplicate <span> tags in the markup in step 1. We will be adding that later with a few lines of jquery. ul#topnav { margin: 0; padding: 0; list-style: none; font-size: 1.1em; ul#topnav li{ margin: 0; padding: 0; overflow: hidden; /*--Important - Masking out the hover state by default--*/ height:40px; ul#topnav a, ul#topnav span { /*--The <a> and <span> share the same properties since the <span> will be a duplicate of the <a> tag--*/ padding: 10px 20px; text-decoration: none; color: #fff; background: url(a_bg.gif) repeat-x; text-transform: uppercase; clear: both; width: 100%; height: 20px; line-height: 20px; /*--Vertical alignment of text--*/ ul#topnav a{ /*--This is basically the hover state of navigation--*/ color: #555; background-position: left bottom; ul#topnav span{ /*--Default state of navigation--*/ background-position: left top; Step 3. Animation jquery

3 3 of 5 7/31/2009 1:44 PM For those who are not familiar with jquery, do check out their site first and get an overview of how it works. I ve shared a few tricks that I have picked up along the way, you can check those out as well. Initial Step Call the jquery file You can choose to download the file from the jquery site, or you can use this one hosted on Google. <script type="text/javascript" src=" </script> As you can see below, we are duplicating the span tags, then animating them -40px to the top to shift the navigation. The following script contains comments explaining which jquery actions are being performed.

4 4 of 5 7/31/2009 1:44 PM $(document).ready(function() { $("#topnav li").prepend("<span></span>"); //Throws an empty span tag right before the a tag $("#topnav li").each(function() { //For each list item... var linktext = $(this).find("a").html(); //Find the text inside of the <a> tag $(this).find("span").show().html(linktext); //Add the text in the <span> tag ); $("#topnav li").hover(function() { //On hover... $(this).find("span").stop().animate({ margintop: "-40" //Find the <span> tag and move it up 40 pixels, 250);, function() { //On hover out... $(this).find("span").stop().animate({ margintop: "0" //Move the <span> back to its original state (0px), 250); ); ); View Demo Conclusion Fancy but a very simple technique! The good thing about this technique is that it degrades gracefully and is still accessible even if js is turned off. If you have any comments, suggestions, or questions please feel free to let me know. Other Fancy Navigations

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